Hot tapping or pressure tapping is the method of making a connection to existing piping or pressure vessels without the interruption of emptying that section of pipe or vessel. This means that a pipe or tank can continue to be in operation whilst maintenance or modifications are being done to it.

http://energotehna.com/
Specijalni radovi
Osvojili smo tehnilogiju priključenja na cevovod pod pritiskom - Topli prikljucak Hot Tap.

http://www.ptmg.hr/media/radovi/clanak-Sistem-Saturn-1.pdf
Novim elektrofuzijskim elementima nazvanim Saturn sistemom Georg Fischer je omogućio izvođačima plinskih i vodovodnih instalacija nov način izvođenja priključnih ogranaka dimenzija većih od 63 mm. Ovim rješenjem mogu se izvoditi priključci bez tlaka ili pod tlakom do dimenzija d = 125 mm.
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Pomoću njega je omogućeno izvođenje priključnih ogranaka do dimenzije od 125 mm kod izrade novih instalacija te izvođenje popravaka i spajanja pod tlakom na već postojećim cjevovodima.

http://www.fgf.hu/storage/file/GF_ELGEF_PLUS_SATURN_Nyeregid...
The new Elgef Plus from Georg Fischer offers gas and water distribution engineers completely new solutions for making large diameter branch connections >_ 90 mm.
Based on the requirements and wishes of our customers the innovative and advanced complete system has been developed for new installations, renovation, repair and under pressure branch connections on existing mains.
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Without shut down of live mains and networks:
Tapping under pressure or without pressure

A pressure tap, or static pressure trap, is an opening within the barrier or wall that binds the flow of a material. This material being stopped by the tap may be a gas or liquid that is used to gauge and measure the amount of pressure pushing the material through the system. The opening made by the tap is always perpendicular to the direction of the flow within the system to prevent interruption of the flow. Pressure tap systems are also commonly referred to as piezometer openings, as piezometer units may be installed at the openings to measure the amount of static pressure within the system.


Pressure taps are commonly used in systems with flows that are pressurized to the point that they create noise within the system that translates to noise outside of the system. For instance, some vehicles require these taps in the exhaust system before the muffler unit to reduce the amount of pressure pushed into the muffler through the exhaust tubing. In this case, the pressure tap is used to gauge as well as release excess pressure from the system so both noise and the probability of damage to the exhaust system or engine are decreased substantially.